import 'package:flutter/material.dart';
import 'package:flutter/services.dart';
import 'dart:async';

 void main() {
   runApp(const MyApp());
 }

class MyApp extends StatelessWidget {
  const MyApp({super.key});

  // This widget is the root of your application.
  @override
  Widget build(BuildContext context) {
    return MaterialApp(
      title: 'Flutter Demo',
      theme: ThemeData(
        primarySwatch: Colors.blue,
      ),
      home: const MyHomePage(title: 'Flutter Demo Home Page'),
    );
  }
}

class MyHomePage extends StatefulWidget {
  const MyHomePage({super.key, required this.title});
  final String title;

  @override
  State<MyHomePage> createState() => _MyHomePageState();
}

class _MyHomePageState extends State<MyHomePage> {
  String _counter = "0";
  final MethodChannel _channel = MethodChannel('plugins.flutter.io/test_ohos');
  
  Future<void> authenticate(dynamic arguments) async {
    print('xxx调用authenticate方法');
    String result = (await _channel.invokeMethod<String>('authenticate', arguments)) ?? "xxx";
	  setState(() {
      _counter = result;
    });
	  print('result=$result');
  }

  void _incrementCounter() async {
	  print('============xxx调用authenticate方法前============');
	  await authenticate("11fff");
	  print('============xxx调用authenticate方法后============');
  }

  @override
  Widget build(BuildContext context) {
    return Scaffold(
      appBar: AppBar(
        title: Text(widget.title),
      ),
      body: Center(
        // Center is a layout widget. It takes a single child and positions it
        // in the middle of the parent.
        child: Column(
          mainAxisAlignment: MainAxisAlignment.center,
          children: <Widget>[
            const Text(
              'You have pushed the button this many times:',
            ),
            Text(
              '$_counter',
              style: Theme.of(context).textTheme.headlineMedium,
            ),
          ],
        ),
      ),
      floatingActionButton: FloatingActionButton(
        onPressed: _incrementCounter,
        tooltip: 'Increment',
        child: const Icon(Icons.add),
      ), // This trailing comma makes auto-formatting nicer for build methods.
    );
  }
}
